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Timeout of the IP NAT Table

Athena4537

Hello,

We are suspecting a problem of saturation with the NAT Table (masquerading).

To solve similar problem (the 65k entries of the table are filled in less than 15 minutes), we just reduced the Timeout of the NAT Table to 5 minutes (on a Cisco router).

 

How can I set this parameter in a Sophos SG ?

And, where can I display this NAT Table (I could not find it) ?

 

Thanks in advance for your help.



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  • +1

    Salut,

    You can see the timeouts with the following:

    # cc get packetfilter timeouts

    Change a setting, for example:

    # cc set packetfilter timeouts ip_conntrack_generic_timeout 300

    A list of active connections is at /proc/net/ip_conntrack.

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
  • 0 in reply to BAlfson

    Hello Bob,

    Thanks for this answer !

    Yes, that is the information I looked for.

     

    But, which parameter do I need to modify to reduce the amount of entries in the table ?

    ip_conntrack_generic_timeout  ?
    ip_conntrack_tcp_timeout_close_wait  ?
    ip_conntrack_tcp_timeout_established  ?
    other ??

  • 0 in reply to Athena4537

    My guess is the example I gave above.

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
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